Data centers and a softer transition lift growth expectations
- Cummins raised 2026 sales guidance to 10% to 13% growth after a strong second quarter.
- Power Systems is effectively sold out into late 2028, driven by massive data center demand.
- New EPA rules allow a phased launch of 2027 engines, lowering the risk of an abrupt sales cliff.
- Accelera revenue guidance increased to $350 million to $400 million, with expected losses narrowing.
- The North American heavy and medium-duty truck markets remain stronger than expected.
A double boost from data centers and regulators
Cummins is in a stronger spot than it was earlier this year. Following a strong second quarter, management lifted full-year 2026 sales growth guidance to 10% to 13%, up from 8% to 11%. They also raised EBITDA margin guidance to 18% to 18.5%. The performance is supported by strong North American truck markets and surging demand for data center power.
The regulatory picture also cleared up. New EPA proposed rules offer flexibility for the 2027 emissions transition, letting Cummins stagger the launch of its HELM engine platforms. This should smooth out the cyclical demand spikes that typically happen before new rules take effect.
The bull case relies on Power Systems staying structurally stronger due to data centers, with capacity effectively sold out through the middle of 2028. At the same time, the Accelera segment is finally narrowing its expected losses, showing that the company can balance future tech investments with present-day profitability.
The bear case centers on execution. Running parallel product lines to smooth the 2027 transition will keep research and warranty costs high. Supply constraints in Power Systems cap the near-term upside, and tariffs remain a lingering issue if global trade tensions rise.
Engines, parts, service, and power
Cummins makes money by selling engines, powertrains, parts, and power generation equipment. Its products go into trucks, buses, RVs, construction machines, mining equipment, marine uses, and standby power systems.
The business also has a service layer. Cummins sells replacement parts and service through about 640 distributor locations and more than 13,000 certified dealer locations across about 190 countries and territories. That helps the company earn cash long after the original engine or generator is sold.
Power Systems is the current growth engine. It sells power generation systems and large engines, including backup power for data centers and other critical sites. Data centers need reliable electricity, and that demand has sold out the segment's capacity into late 2028.
Cummins is also spending on Destination Zero, its plan to cut emissions over time. That includes cleaner engine platforms and zero-emission technologies. The hard part is timing, since diesel still pays the bills while newer technologies like batteries and fuel cells are not yet as profitable.
What Cummins sells
Truck and bus engines
Cummins sells engines for heavy-duty trucks, medium-duty trucks, buses, RVs, and light-duty automotive markets. This is a core profit pool that is heavily cyclical.
Power generation systems
These systems provide standby and prime power for data centers, healthcare, and other critical sites. Capacity is largely sold out into late 2028.
Components
The segment sells filtration, aftertreatment, turbochargers, fuel systems, drivetrain systems, and automated transmissions. It is tied to truck demand and service needs.
Distribution and aftermarket
Cummins sells engines, generator sets, parts, and service through its distribution network. Parts and service help smooth the business when new equipment sales drop.
Industrial engines
Cummins builds engines for construction, mining, agriculture, marine, rail, defense, and power generation uses. These markets add diversity beyond highway trucks.
Accelera zero-emission systems
Accelera includes battery electric powertrains and fuel cell systems. It is still loss-making, but divestitures are narrowing the focus and reducing the expected burn.
HELM engine platforms
Cummins will begin a phased launch of 2027-compliant HELM platform engines, starting with the X15 and X10 in 2027. The medium-duty B platform is delayed to 2028.
Q1 sales mix
Segment shares use external sales from Cummins' Q1 2026 Form 10-Q for the three months ended March 31, 2026. Distribution is the largest reported segment by external sales, while Accelera remains very small and loss-making.
What could go wrong
Transition execution costs
Medium impact · High oddsThe new EPA rules allow Cummins to stagger its 2027 engine launch. While this reduces the risk of an abrupt sales drop, it means Cummins will run parallel manufacturing lines for old and new engines. That could keep warranty and research costs high.
Power Systems margins peak
High impact · Medium oddsPower Systems is guided to a 25% to 25.75% EBITDA margin for 2026, which is very strong for an industrial business. Data center demand is high now and capacity is tight, but competition could pressure pricing over time. If margins fall while investors expect them to stay high, the stock could reset.
Medium-duty engine delay
Medium impact · Medium oddsCummins delayed the medium-duty B platform engine to January 2028. That may leave a competitive gap in 2027 if rivals launch compliant products on time. The risk is lost market share, weaker pricing, or extra costs to bridge customers through the delay.
Emission credit write-down
Low impact · Medium oddsThe U.S. Environmental Protection Agency repealed greenhouse gas standards for on-highway vehicles in February 2026. That could reduce future compliance costs, but it also creates a near-term accounting risk. If NHTSA rules block the use of existing credits, Cummins could take a non-cash expense of up to $99 million.
Accelera cash burn
Medium impact · High oddsAccelera is still expected to lose $260 million to $290 million of EBITDA in 2026. The segment matters because Cummins needs future low-emission products, but demand for some green hydrogen projects has weakened. The company must keep finding ways to narrow these losses.
In one breath
What does Cummins actually do?
Cummins designs, builds, sells, and services engines, powertrains, power generation systems, and related parts. Its products are used in trucks, buses, data centers, construction, mining, agriculture, marine, and other industrial markets.
Why are data centers important for Cummins?
Data centers need reliable backup power, and Cummins sells generators and large power systems for that use. Power Systems capacity is effectively sold out into late 2028, showing that this demand is a major growth driver.
Is Cummins moving away from diesel?
Not quickly. Diesel and related parts still fund much of the company, but Cummins is investing in cleaner engines and zero-emission systems through its Destination Zero strategy. The shift is gradual because commercial fleets change slowly and need dependable, cost-effective equipment.
What is the biggest risk for Cummins investors?
The biggest near-term risk is the execution of its engine transition. The new 2027 EPA rules allow a phased launch, but Cummins still faces higher warranty and research costs as it brings new engine platforms to market alongside older models.
